import java.io.*;


public class per_ {
    public static void main(String[] args) throws Exception {
        String pathname="d:\\data.dat";
        ObjectOutputStream obj=new ObjectOutputStream(new FileOutputStream(pathname));
        obj.writeBoolean(true);
        obj.writeInt(100);
        obj.writeObject(new Dog("xx",12));
    }
}
class Dog implements Serializable{
    String name;
    int age;

    public Dog(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Dog{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}